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Use and Maintenance of Mixed Flow Pump

Model AHWpump is a horizontal single stage single suction volute mixed flow pump andsuitable for transporting pure water or the other liquid with both physical andchemical natures similar to those of water, with the temperature of the liquidto be transported not over 50 , for the farm land irrigation, industrial andcity water supply and drainage etc. multiple places.

Following isthe use and maintenance of our AHW series mixed flow pump:


Takea trial movement after the pump is installed to check the moving direction ofit and remove the defect in the installation.

2.Sequence of trial:

(1)Closethe outlet gate valve or check valve.

(2)Fillleading water: first start the pump and fill water into it through the screwhole on the top of it or open the check valve to let the water in the water-outpool back primed in or directly use a vacuum pump to lead water by means ofexhausting (when the vacuum pump exhausts the air inside of the pump completelyand gets water out, start the pump and stop the vacuum pump).

(3)Whenthe mover reaches the normal speed, open the gate valve fully and adjust thepacking tightness . Have the pump go on moving in case of a normal movement andbearing temperature and a slight vibration (when the check valve is used, liftthe bonnet when water goes out so as to reduce resistance).

3.Use and maintenance:

(1)Whenthe bearing uses thin oil for lubricating, often check and control the oillevel with the bearing body in between two marking lines on the oil levelerrod; and when it uses dry oil (lubricating grease), supplement a proper amount ofoil in a periodic time by means of removing both front and rear covers formodel 150~350AHW pump and the oil cup for model 400~800AHW pump.

(2)Oftencheck the bearing's temperature rise, which should not be over the ambient oneby 35 generally and by 75 to the utmost extent.

(3)Payattention to both frictional and collided sounds which may occur during thepump movement. In case of friction between both pump cover and impeller, addpaper pad in between both pump cover and casing. The applicable interval in theactual use is 0.3~0.7mm.

(4)Adjustthe packing properly to have the liquid intermittently leak in drops from thepacking gland. Too tight packing will cause the shaft heated and the powerincreased while too loose will cause excessive liquid leak and a loweredefficiency.

(5)Incase of direct link between both pump and motor, have the axial lines of bothon a same straight line.

(6)Checkif there is air which leaks from the water-in pipe-line.

(7)Payattention to the power to see if it is suddenly enlarged or lowered and if theflow is suddenly reduced, stop the pump to troubleshoot if it is.

(8)Oftencheck if the bolts get loose due to vibration.

Anyother help, please feel free to contact to us.

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